Sunk on 18 August 1943 in the North Atlantic south of Dakar, in position 13.42N, 17.36W, by depth charges from a French Wellington aircraft (344 Sqn RAF/HZ697). 49 dead (all hands lost). (FDS/NHB, June 1993).

Sunk 18 Aug, 1943 in the mid-Atlantic near Dakar, in position 14.11N, 17.40W, by depth charges from a British Hudson aircraft (Sqdn. 200/O). (Postwar assessment)Notes. This attack was also against the U-403 without inflicting heavy damages.

30 Jul 1943The boat was proceeding on the surface with U-43 when Avenger and Wildcat aircraft from the US escort carrier USS Santee. Both boats dived: two depth charges were dropped on U-403, and a Fido homing torpedo was launched at U-43. U-403 escaped, but U-43 was lost with her crew of 55. (Sources: Blair, vol 2, page 397)

18 Aug 1943An attack on U-403 on 18 Aug. 1943 in the Atlantic off Dakar in position 14.11N, 17.40W, in which a British Hudson bomber (Sqdn. 200/O) dropped depth charges, was believed to have sunk her, but in fact caused only minor damage.

The boat was sunk later the same day in another attack.

(Sources: 1993-06-01, FDS/NHB)

4 recorded attacks on this boat.

General notes on this boat

10 May 1943. The boat had a gunnery duel with the Dutch merchant ship Dexterous.

Men lost from U-boats

Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-403 did not suffer any casualties (we know of) until the time of her loss.

U-boat Emblems

We have 1 emblem entry for this boat. See the emblem page for this boat or view emblems individually below.